Improvement in metal-drilling machines



, v 3She'ets-S11eet2. E. W. FAWGE-TT. Metal-Drilling Machine.

' No. 216,264.. PatentedJune-10,1879} Fig-2;

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.tailed view of the feed-wheel.

beveled edges.

PATENT OFFICE. r

EDWARD w. FAWOETT, or SALEM, OHIO.

IMPROVEMENT IN METAL-DRILLING MACHINES.

Specification forming part of Letters Patent No. 216,264, dated June 10,1879; application filed June 3, 1876.

To all whom it may concern:

Be it known that I, EDWARD W. FAWOETT, of Salem, in the county ofOolumbiana and State of Ohio, have inventedcertain new and usefulImprovements in Metal-Drillin g Machines, of which the following is aspecification.

The nature of my invention relates to metaldrilling machines; and itconsists in the construction and combination of the operating partsthereof, as will be hereinafter more fully set forth.

' In the accompanying drawings, forming part of this specification,Figure l is a side elevation. Fig. 2 is a front view. Fig. 3 shows de-Figs. 4 and 5 are detail views. Fig. 6 is a side elevation, partly insection, showing the side opposite that shown in Fig.1. Fig. 7 is abottom view, showing gib.

A represents a standard, to which the machine is attached. E is aframeor casting, secured on or formed with the standard A, and forming threehearings, to and b b, on a vertical line at the front edge. The twolower bearings, b b, contain the sleeve H, through which the mandrel ordrill-shaft G passes. In the upper bearing, a, is journaled the nut d,through which the feed-screw I passes, said nut being rotated by thefeed-wheel J, to which it is secured bya set-screw. The lower end of thefeed-screw I is connected to the mandrel or drill-shaft G by aswivel-joint at h, and is kept from turning by the pin 2', which slidesin a groove or slot in the front of the frame or casting E.

To the above parts I lay no claim, as they have all been used previouslyin this class of machines.

B is a vertical way or guide attached to or formed on the standard A,and provided with ()n this guide slides the L- shaped support 0,constructed to form a dovetailed joint at one side of the guide B, whileat the other side is introduced a gib, B, as shown in Fig. 7, which isdrawn up by a bolt and nut, 09, to hold the support at any pointdesired. The horizontal arm of this support is forked, and has V-shapedsides on which the table D is adjusted by means of a gib, O,

and set-screw y, and held in any position desired.

On the sleeve H is secured a bevel-pinion, K, which engages with a bevelvcog-wheel, L, and from which it receives its motion. This bevelcog-wheel L is either cast with or at tached to an internal gear-wheel,M, and this combined wheel is provided with a crank, N, and placed upona stud projecting from the frame or casting E.

The internal gear-wheel M meshes with a pinion, 0, upon one end of ashaft having its bearing in said frame, and upon the other end of whichis secured the fly-wheel P, said flywheel being also provided with acrank, B.

By using the internal gear-wheel a much higher speed may be obtained forthe fly-wheel, while the several parts are much more compact than wouldotherwise be possible.

The fly-wheel is driven in the same direction as the crank-wheel, sothat when more power is desired it can be obtained by the operatorsimply changing hands from the crank-wheel to the iiy-wheel withoutmaterially changing the position of the operator, or placing him at aninconvenient distance from his work.

On a stud projecting from the side of the frame E, near the top, isplaced a lever,S, to the upper end of which is pivoted a pawl, m. Thispawl takes into an annular series of ratchet-teeth, a, formed in theupper surface of the feed-wheel J. The lowerend of the lever S is curvedand slotted, as shown, said curve being struck from the center of thedriving-wheel, and through this slot passes a stud, 12, carrying ananti-friction-wheel, W.

The stud 12 may be adjusted to any point desired on the slotted arm orlever S, and is held by a set-nut, s, or other convenient means.

The friction-wheel W runs on a cam or eccentric, t, formed on orattached to the wheel L. M. As this latter wheel revolves, the cam toperates the friction-wheel and its arm so that the pawl m will turn thefeed-wheel J, and thus feed the drill.

With the anti-friction wheel W, in combina tion with the eccentric orcam t and the slotted arm S, any desired movement of the feedwheel maybe obtained with the minimum amount of friction, while the eccentric orcam may be left rough without materially affecting the result.

By adjusting the stud p, on which the antifriction wheel rotates, in theslotted arm, a

fast or slow feed is obtained. as required.

The ratchet-teeth n are sunk below the surface of the feed-wheel J, soas not to interfere with the operator handling the same when feeding byhand.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a feed device for metal-drilling machines, the pivoted lever S,curved and slotted, as shown, the said curve being struck

